Curved Bar Navigation In Flutter

Curved Bar Navigation In Flutter :

Curved Bar Navigation In Flutter : Today We will get the information about how to design curved bar navigation in flutter also get the knowledge of its attributes.below given the attributes list and its use with the example of curved bar navigation in flutter

Attributes :

items: List of Widgets
index: index of NavigationBar, can be used to change current index or to set initial index
color: Color of NavigationBar, default Colors.white
buttonBackgroundColor: background color of floating button, default same as color attribute
backgroundColor: Color of NavigationBar’s background, default Colors.blueAccent
onTap: Function handling taps on items
animationCurve: Curves interpolating button change animation, default Curves.easeOutCubic
animationDuration: Duration of button change animation, default Duration(milliseconds: 600)
height: Height of NavigationBar, min 0.0, max 75.0

i will explain curved bar navigation in flutter using small example.the file output is given below

Screenshot :

1.main.dart

import 'package:flutter/material.dart';
import 'tabbar_animation.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: ''),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: TabBarAnimation(),
    );
  }
}

2. tabbar_animation.dart

import 'package:curved_navigation_bar/curved_navigation_bar.dart';
import 'package:flutter/material.dart';

class TabBarAnimation extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _BubblesState();
  }
}

class _BubblesState extends State<TabBarAnimation>
    with SingleTickerProviderStateMixin {
  final Color color = Colors.pink;
  int _page = 0;
  String tabNo = 'Add Tab';

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        bottomNavigationBar: CurvedNavigationBar(
            index: 0,
            height: 50,
            items: <Widget>[
              Icon(Icons.add, size: 30),
              Icon(Icons.list, size: 30),
              Icon(Icons.compare_arrows, size: 30),
              Icon(Icons.call_split, size: 30),
              Icon(Icons.perm_identity, size: 30),
            ],
            color: Colors.white,
            buttonBackgroundColor: Colors.white,
            backgroundColor: Colors.purple,
            animationCurve: Curves.easeInOut,
            animationDuration: Duration(milliseconds: 600),
            onTap: (index) {
              setState(() {
                _page = index;
                if (_page == 0) {
                  tabNo = 'Add Tab';
                } else if (_page == 1) {
                  tabNo = 'List Tab';
                } else if (_page == 2) {
                  tabNo = 'Exchange Tab';
                } else if (_page == 3) {
                  tabNo = 'Direction Tab';
                } else {
                  tabNo = 'Profile Tab';
                }
              });
            }),
        body: Container(
            color: Colors.purple,
            child: Stack(children: <Widget>[
              Center(
                  child: Column(children: <Widget>[
                SizedBox(
                  height: 100.0,
                ), // Margin

                Text('FlutterTutorial',
                    textScaleFactor: 4.0,
                    style: TextStyle(
                        color: Colors.white,
                        fontSize: 10,
                        fontStyle: FontStyle.normal,
                        fontWeight: FontWeight.bold,
                        shadows: <Shadow>[
                          Shadow(
                            offset: Offset(2.0, 2.0),
                            blurRadius: 3.0,
                            color: Color.fromARGB(255, 0, 0, 0),
                          ),
                          Shadow(
                            offset: Offset(2.0, 2.0),
                            blurRadius: 8.0,
                            color: Color.fromARGB(125, 0, 0, 255),
                          )
                        ])),

                Container(
                  color: Colors.white,
                  height: 2.0,
                  width: MediaQuery.of(context).size.width - 30,
                ),

                Container(
                    color: Colors.purple,
                    child: Center(
                        child: Text(tabNo,
                            textScaleFactor: 3.0,
                            style: TextStyle(
                                fontSize: 10,
                                color: Colors.white,
                                shadows: <Shadow>[
                                  Shadow(
                                    offset: Offset(2.0, 2.0),
                                    blurRadius: 3.0,
                                    color: Color.fromARGB(255, 0, 0, 0),
                                  ),
                                  Shadow(
                                    offset: Offset(2.0, 2.0),
                                    blurRadius: 8.0,
                                    color: Color.fromARGB(125, 0, 0, 255),
                                  )
                                ]))))
              ]))
            ])));
  }
}

3. pubspec.yaml

name: welcome
description: A new Flutter application.

version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2
  curved_navigation_bar:

dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:
  uses-material-design: true

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